cv device configlets mode

[titom73]

Refactor cv_device to allow easier updates

• Refactor cv_device to allow easier updates
• Support new devices provisioning
• Support device reset
• Support configlet update
• Update module & code documentation

Support configlet_mode

• Capture inputs
• Implement all 3 modes
• Update module documentation

Feature use case:

- name: Test cv_device
  hosts: cvp
  connection: local
  gather_facts: no
  collections:
    - arista.cvp
  vars:
    configlet_list:
      cv_device_test01: "alias a{{ 999 | random }} show version"
      cv_device_test02: "alias a{{ 999 | random }} show version"
    # Device inventory for provision activity: bind configlet
    devices_inventory:
      veos01:
        name: veos01
        configlets:
          - cv_device_test01
          - SYS_TelemetryBuilderV2_172.23.0.2_1
          - veos01-basic-configuration
          - SYS_TelemetryBuilderV2
  tasks:
    - name: "Configure devices on {{inventory_hostname}}"
      tags:
        - provision
      cv_device:
        devices: "{{devices_inventory}}"
        cvp_facts: '{{cvp_facts.ansible_facts}}'
        device_filter: ['veos']
        configlet_mode: <merge|overide*|delete>
      register: cvp_device